BlindDeHalo

# BlindDeHalo - v0.1
#
# This script removes the light & dark halos from too strong "Edge Enhancement"
# Adaption of the parameters has to be done manually for each source, the function is not adaptive.
#
# Needed Plugins: MaskTools.dll >= 1.4.15
#                 undot.dll
#

function BlindDeHalo( clip clp, int "strength", int "radius_x", int "radius_y", float "darkamount", string "mode", float "maskblur", bool "fullframe" )
       {
         strength =   default( strength,  80)
         radius_x =   default( radius_x,   2)
         radius_y =   default( radius_y,   2)
         darkamount = default( darkamount,1.0)
         mode =       default( mode,  "soft")
         maskblur =   default( maskblur, 1.0)
         fullframe =  default( fullframe, false)
         modus = mode=="hard" ? "hardlight" : "softlight"

         ox = clp.width
         oy = clp.height
         rx = sqrt(radius_x)
         ry = sqrt(radius_y)

         clp
         edge=Dedgemask(0,255,0,255,"6 10 6 10 -64 10 6 10 6",setdivisor=true,divisor=64).levels(2,0.5,6,0,255,false).undot#.coloryuv(analyze=true)#

         blur1 = bicubicresize(int((ox/rx)/4 +.5)*4,int((oy/ry)/4 +.5 )*4,-1.0,1.0).lanczosresize(ox,oy)
         blur2 = bicubicresize(int((ox/rx)/4 +.5)*4,int((oy/ry)/4 +.5 )*4, 1.0,0.0).lanczosresize(ox,oy)

         diff = YV12subtract(blur1,blur2)

         overlay(diff,diff,mode="hardlight").levels(0,1.0,255,88,168,false)

         darkamount == 1.0 ? NOP : overlay(last,last.levels(0,1.0,128,int(128-128*darkamount),128,false),mode="lighten")
         overlay(last,last.levels(0,1.0,255,128+strength,128-strength,false)) # levels reversed: no more "invert" in below overlay()

         overlay(clp,last.greyscale.blur(maskblur),mode=modus)
         fullframe ? NOP : MaskedMerge(clp,last,edge.deflate.expand.blur(1.58).inflate,useMMX=true)

         return(last)
       }
#